Attachment for anesthetizing-machines.



YGLGLARKE. ATTACHMENT FOB ANBSTHBTIZING MACHINES.-

' APPLICATION IILED JAN. 25, 1912.

Patented Apr. 30, 1912.

e one o UNITED STATES PATENT OFFICE.

GRAHAM CLARKE, F CLEVELAND, OHIO, ASSIGNOR TO THE OHIO CHEMICAL & MANU- FACTURING COMPANY, OF CLEVELAND, OHIO, A CORPORATION OF OHIO.

ATTACHMENT FOR ANESTI-IETIZING-MAC-HINES.

To all whom it may concern:

Be it known that I, GRAHAM CLARKE, a citizen of the United States, residing at Cleveland, in the county of Cuyahoga and State of Ohio, have invented a certain new and useful Improvement in Attachments for Anesthetizing-Machines, of which the following is a full, clear, and exact description.

0 This invention is an attachment for a well known anesthetizing machine, the object being to provide means by which such machine, or a part thereof, may cheaply and quickly be endowed with the capacity for 5 automatically controlling and regulating the pressure at which gas may be discharged therefrom.

The invention is shown in the drawing, and hereinafter described and defined in the 0 appended claim.

In the drawing, Figure 1 is a plan view of the anesthetizing machine with the improved attachment secured to one part thereof; and Fig. 2 is a perspective view of 5 said attachment.

The machine for which this attachment has been designed includes a base A, where on is a vertical standard a, shown in dotted lines in Fig. 1, which standard supports a 0 horizontal frame. This frame includes a central mixing chamber C, having discharge orifice to which a flexible tube 0 is secured. It will be understood by those familiar with this art that the mouth piece 5 or nose piece will be fixed to this tube. Connected with the mixing chamber and extending horizontally in opposite directions therefrom are two T-shaped arms D, D. Each of the branches of these two arms has at its 0 end a yoke cl, within which the discharge neck f of a gas tank F may be clamped by a set bolt at, so that the orifice in the side of the gas tank neck through which the gas is discharged will be in communication with a gas duct (Z in the arm which duct communicates with the mixing chamber C. It is customary to secure two tanks F of anesthetizing gas to the two branches of one of the arms D, D, and two tanks F of oxygen to 0 the two branches of the other of said arms D, D. In fact the drawing shows four gas tanks secured in the usual way to four of the yokes of the machine.

Flexible gas bags S are suspended from the two arms D, D and are in open com- Speci fication of Letters Patent.

Application filed January 25, 1912.

Patented Apr. 30, 1912. Serial No. 673,310.

munication with the ducts therein. The flow of gas from any of the gas tanks (in which the gas is contained at high pressure) to and through the mixing chamber can be sufiiciently Well controlled for many uses of the machine by means of the valves on the gas tank, and these flexible bags, al though it requires rather frequent manipulation of the valves to dot-his. There are, however, many uses of the machine which render it desirable that the pressure of the gas, as it flows from the gas tank to the mixing chamber and thence to the patient shall be automatically reduced and regulated, so that although the gas may continuously flow, it will enter the mixing chamber continuously at any desired predetermined pressure. The attachment in which the present invention is embodied is especially adapted for use with this particular machine, and when used will efi'ect the above mentioned desired result. This attachment has a main frame member B, and this frame member has essentially a lower horizontal arm 6 and an upper vertical arm 6. What may be the shape of the intermediate parts of the frame is of no consequence. The lower arm I) terminates in a yoke 6 within which the discharge neck of a gas tank may be clamped by means of a set screw 6 with that side of the neck in which is the discharge orifice in contact with the inner end of the yoke, and in communicationgvith a gas duct 6 which, as shown by dotted lines in Fig. 2, extends from said end of the yoke through the arm, and thence laterally outward through a laterally extended lug If. The vertical upper end of this attachment has a portion which is shaped like the discharge neck of the gas tank. A gas duct 6 extends from one vertical face of this part of the arm inward, and then downward and around through the frame, and out through a laterally extended lug b which is rigid with said frame.

E represents an automatic gas pressure regulator. The outlet tube 0 of thisregulator is screwed onto the laterally extended lug b so that said regulator will be wholly supported by said frame. The inlet e of the regulator is connected by means of a bent pipe 6 with the laterally extended lug b i i In use the upper vertical arm of the attachment/ is clamped in one of the yokes of the machine, so that the discharge end of the orifice in the attachment will communicate with the gas duct which terminates at the end of said yoke and extends therefrom to the mixing chamber. Thereby the attachment is wholly supported by the machine. Next a gas tank is clamped in the yoke b of the lower arm of the attachment, so that the discharge orifice in its neck will register with the gas duct in the lower arm. \Vhen the gas cylinder is so clamped in this yoke it will be wholly supported by the attachment. If, now, the valve of the tank be open, the gas will flow therefrom into the lower arm Z), thence through the pipe 6 into the gas regulator, and thence through lug Z1 into the duct in the upper part of said frame, and thence through the discharge end of said duct into the duct in the arm (Z to which the attachment is secured.

The gas regulator which forms a part of this attachment is of familiar construction, such, for example, as is shown in my copending application No. 665,637, filed Dec. 1 1911. A gas regulator, however, may be employed provided it is capable of effecting a desired reduction in the pressure of gas passing through it. To be wholly satisfactory, however, it must be adjustable so as to be able to regulate and adjust the pressure at which the gas is delivered therefrom in accordance with the requirements of use.

One or more of these attachments may be employed and secured to the machine. They are easily secured in place, and easily removed when they are no longer required.

Having described my invention, I claim:

An attachment for anesthetizing machines, comprising a rigid frame member which has at its lower end a horizontal arm terminating in a yoke in which the discharge neck of a gas tank may be secured and having also a vertical upper end whereon one side is flat, said frame also having two laterally projecting lugs and the frame also containing ducts, one of which extends from the flat face of the upper end to and through the upper laterally projecting lug, and the other duct extends through the lower arm of said attachment from the inner end of the yoke to and through the lower laterally extended lug, and an automatic gas pressure regulator which is secured to and supported by the upper laterally extended lug, and is connected by a pipe with the lower laterally extended lug.

In testimony whereof, I hereunto aflix my signature in the presence of two witnesses.

GRAHAM CLARKE.

Witnesses E. L. TrrURsToN, H. R. SULLIVAN.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. C. 

